Theia's 4K compatible varifocal telephoto lens can be used for long distance surveillance and license plate recognition.  It is designed for sensors such as 1/2.5" 5MP and 1/2.3" 4K resolution.  The excellent IR correction allows Day/Night operation without needing to refocus when switching to IR illumination.  The lens can be adjusted for focal lengths from 9-40mm for unobtrusive security.